/*
 * Copyright 2005 Joe Walker
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dwr.reverseajax;

import java.util.LinkedList;

import org.directwebremoting.Browser;
import org.directwebremoting.ui.dwr.Util;

/**
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class JavaChat {
	/**
	 * @param text The new message text to add
	 */
	public void addMessage(String text) {
		// Make sure we have a list of the list 10 messages
		if (text != null && text.trim().length() > 0) {
			messages.addFirst(new Message(text));
			while (messages.size() > 10) {
				messages.removeLast();
			}
		}

		// Clear the input box in the browser that kicked off this page only
		Util.setValue("text", "");

		// For all the browsers on the current page:
		Browser.withCurrentPage(new Runnable() {
			public void run() {
				// Clear the list and add in the new set of messages
				Util.removeAllOptions("chatlog");
				Util.addOptions("chatlog", messages, "text");
			}
		});
	}

	/**
	 * The current set of messages
	 */
	private final LinkedList<Message> messages = new LinkedList<Message>();
}
